From 6316c939d5f7df7669fa3f12ae9f74821670ff0c Mon Sep 17 00:00:00 2001
From: "Hongli Lai (Phusion)" <hongli@phusion.nl>
Date: Mon, 13 Sep 2010 22:55:36 +0200
Subject: [PATCH] Optimize Mongo::Connection#send_message_on_socket: don't
 slice the input when not necessary.

---
 lib/mongo/connection.rb | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/lib/mongo/connection.rb b/lib/mongo/connection.rb
index 3b6e859..941a2e1 100644
--- a/lib/mongo/connection.rb
+++ b/lib/mongo/connection.rb
@@ -845,11 +845,14 @@ module Mongo
     # @return [Integer] number of bytes sent
     def send_message_on_socket(packed_message, socket)
       begin
-      total_bytes_sent = 0
-      while packed_message.size > 0
-        byte_sent = socket.send(packed_message, 0)
-        total_bytes_sent += byte_sent
-        packed_message.slice!(0, byte_sent)
+      total_bytes_sent = socket.send(packed_message, 0)
+      if total_bytes_sent != packed_message.size
+        packed_message.slice!(0, total_bytes_sent)
+        while packed_message.size > 0
+          byte_sent = socket.send(packed_message, 0)
+          total_bytes_sent += byte_sent
+          packed_message.slice!(0, byte_sent)
+        end
       end
       total_bytes_sent
       rescue => ex